1989 NEW PRODUCT INFORMATION THM 400/475
MODELS: 1989 C,K,P,G,R,V TRUCKS EQUIPPED WITH THM 400/475 HYDRAMATIC 3L80/3L80HD AUTOMATIC TRANSMISSIONS
This information is an update to your 1989 Service Manual Transmission Diagnosis Section. A new model, DNA, was released after publication date.
Figure 1 - THM 400 Shift Speed Chart
1989 "THM 400" SHIFT SPEED CHART
1-2 MIN 2-3 MIN 1-2 3-2 COAST 2-1 COAST MODEL THROTTLE THROTTLE W.O.T.* DOWN DOWN ----- -------- -------- ------ ---- ----
AHA, FCA, LFA, LRA, LSA 11 20 48 18 11
DNA 8 22 36 20 7
FAA, LXA 9 16 34 14 9 FBA 8 18 34 16 8 FDA, FFA, FZA 8 17 29 16 7 FGA 12 23 69 21 11 FJA, FNA, FUA 9 22 36 21 8 FKA, HRA 7 17 30 15 7 FMA, FWA, TYA 9 17 35 14 9 FPA, FYA 9 22 36 20 8 FQA, LLA 12 22 47 20 12 FRA 7 15 30 14 7 FSA, FXA 7 13 30 12 7 FTA 8 17 35 15 7 FVA 10 18 41 17 9
HAA 7 16 29 14 6
LBA, LDA, LHA, LJA 11 22 43 19 11 LKA, LUA, LZA 8 17 29 16 7 LMA, LWA, TUA 9 16 35 14 8 LTA 9 16 35 14 7
MAA 7 9 27 8 6
RDA, RLA 12 26 50 24 10 RKA 11 23 50 20 10 RMA 11 20 50 19 10
TAA, TZA 9 16 34 14 8 TBA,TPA 8 22 36 21 8 TCA, TFA, TNA 8 19 34 18 8 TDA, TKA, TMA, TLA 8 19 34 17 8 TSA 8 12 27 11 8
ZDA 12 22 55 20 12 ZWA 9 18 59 8 8
NOTES:
1. ALL SPEEDS INDICATED ARE IN MILES PER HOUR. CONVERSION TO Km/h = MPH x 1.609.
2. SHIFT POINTS WILL VARY SLIGHTLY DUE TO ENGINE LOADS AND VEHICLE OPTIONS.
* 'WIDE OPEN THROTTLE
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
